Rafael Luis O'Halloran1, Murat Aksoy1,
Tobias Kober2, Roland Bammer1
1Department of Radiology, Stanford
University, Stanford, CA, United States; 2Laboratory for functional
and metabolic imaging, Ecole Polytechnique Fdrale de Lausanne, Lausanne,
Switzerland
A
simple method of respiratory monitoring using the phase of the DC term of
k-space collected with a spiral k-space trajectory is presented and compared
with the measurement from the respiratory bellows. The method presented is
shown to be in excellent agreement with the measurement from the respiratory
bellows and reveal even cardiac pulsatility. In this work the method is used
to gate a spiral-trajectory scan of the liver. The image reconstructed with
the DC phase used for gating was qualitatively similar to the one
reconstructed using conventional gating. Since the image data is used for
gating no additional navigators must be acquired.
Keywords